There are three theme parks at Universal Orlando: Universal Studios, Volcano Bay and Islands of Adventure. They're fun, exciting and packed with rides and attractions!
The difference between Universal Studios & Islands Of Adventure in a nutshell:
The easiest way to describe the difference is that the rides and attractions at Universal Studios are based more on movies and TV shows, and Islands of Adventure is where the fantasy and thrill rides are. If you’re after the big thrill rides, head to Islands of Adventure. If you’re after a milder experience of rides and attractions, Universal Studios is the place for you!